The Doctor first encountered the Daleks on the radiation-soaked planet of Skaro, waging war with the peaceful Thals. The Daleks were the mangled and mutated remains of the Kaled people, placed in metal war machines by the Kaled’s chief scientist Davros. Pursuing the Doctor across space and time, the Daleks invaded the Earth, developed the Reality Bomb and tried to imprison the Doctor in the Pandorica. They fought the Time Lords in The Last Great Time War – a conflict so powerful and destructive that the universe was said to convulse. In an effort to save reality, the Doctor used ‘the Moment’ to annihilate both races. But that wasn’t the end of the Daleks….
Originally born on Earth’s twin planet Mondas, the Cybermen were created as the Mondasians replaced parts of their dying bodies with plastic and steel. Eventually they added emotional inhibitors, supressing all feelings – love, hate, even fear. Cybermen can convert humans wherever they go, and take orders from a Cyberleader, whose data can be downloaded to a drone if the leader is destroyed. Like the Daleks, the Cybermen have dogged the Doctor through space and time. He has prevented them destroying Earth’s weather system, getting their hands on the Nemesis statue and taking over Victorian London with their Cyber-King. The Tenth Doctor visited a parallel universe, where Cybus Industries had developed Cybermen to prolong John Lumic’s dwindling life.
The Great Intelligence was a formless entity, wandering in space. It first encountered the Eleventh Doctor in 1892, when it took the form of snow. It found an ally in Doctor Simeon, and through him attempted to create a race of ice-people. In 1935, the Second Doctor encountered the Intelligence living in the mind of Buddhist monk Padmasambhava, keeping his frail form alive for hundreds of years. It was through him that the Intelligence tried to manifest itself in physical form as robot Yetis. It returned once more as a mysterious London fog that consumed everything it touched in a web-like substance. This attempt at corporeal form was thwarted, when the Intelligence’s control spheres were destroyed. But the Great Intelligence escaped once more…
An advanced race of reptilian humanoids, tribes of Homo Reptilia were the dominant life-form on Earth before the evolution of humanity. When a large object appeared in the sky the Silurians retreated underground or escaped Earth in an Ark (the object harmlessly entered Earth’s orbit as the Moon). The Doctor has encountered three tribes of Silurians whose hibernation had been disturbed by human activity. Whilst honourable warriors, they often found co-habitation with humanity impossible, due to war-like factions on both sides. In 2367, the Eleventh Doctor found the remains of a Silurian space Ark, which - after a pirate trader called Solomon had murdered the Silurians aboard - contained only dinosaurs. The dinosaurs were settled on a new world, named Siluria.
Davros was Chief Scientist of the Kaleds towards the end of their thousand year war with the Thals on the planet Skaro. Confined to a mobile life-support system, Davros developed a final solution to end the war: The Daleks – mutated Kaleds robbed or morality and with added aggression, placed inside armoured shells called the Mark III Travel Machines. However, his own people rejected the notion, and in retaliation he gave the Thals the formula to destroy the Kaled dome. Safe in the bunker below, Davros released the Daleks on an unsuspecting world. However, the Daleks turned upon their creator, and left him for dead in the bowels of the city on Skaro. Years later, the Daleks sought his help to defeat their logical stalemate with the Morvellans and then again to defeat the Morvellan virus. Later he became The Great Healer, turning the bodies of the dead into food, or new “Imperial” Daleks. His grip on the Daleks weakened, as a renegade faction grew up – loyal to the Supreme Dalek - plunging them into civil war. He commanded Dalek forces during The Last Great Time War, and was seen flying into the jaws of the Nightmare Child. Rescued by Dalek Caan, Davros constructed the Reality Bomb, but was foiled by the Children of Time. He was last seen cursing the Doctor as “The Destroyer of Worlds” as the Crucible burned around him.
Autons are the living plastic foot-soldiers of a formless entity known as the Nestene Consciousness. Its affinity for and ability to animate plastics has led it to Earth many times, and into conflict with the Doctor. From replacing shop-window dummies and people in positions of authority with Auton replicas to deadly plastic chairs, dolls,daffodils and rubbish bins, the Nestene have attacked humanity in some of the most creative and grisly ways imaginable. The Ninth Doctor claimed to have witnessed the destruction of the Nestene homeworld in the Time War, but was unable to save it. As part of the Pandorica Alliance, the Nestene created Auton Romans at Stonehenge – including Rory Williams – from Amy Pond’s memories.
Meaning “the shadows that melt the flesh”, Vashta Nerada occur naturally on most planets – including Earth – in small clusters, like the dust in sunbeams. In The Library, the Doctor encountered an entire swarm of Vashta Nerada, stripping the flesh from numerous members of Mr Lux’s unfortunate crew. The Doctor brokered a deal with the creatures (who were using the animated remains of the crew in their flight-suits): if he could get the humans off the planet, the Vashta Nerada could remain in the “forests” of books.
Known as “The Lonely Assassins”, the Weeping Angels are quantum-locked alien killers, as old as the universe itself. Little is known of their origins or culture. When observed, they freeze like stone, but in the blink of an eye they can move vast distances. The touch of an Angel hurls their victim back in time – allowing the Angel to feast on the energy of their unlived days. Initially, the Tenth Doctor encountered four Angels, who sent him back to 1969. He left clues for Sally Sparrow to find and help trap them – releasing him and the TARDIS. Later encounters have seen a whole mausoleum of statues, tiny cherubs and even the Statue of Liberty transformed into Weeping Angels. Both Amy and Rory were trapped by a Weeping Angel, when it sent them back to 1938 to live out their lives together. In the 51st Century, the Doctor trapped the Angels in a crack in time, erasing them from history.
Rather than a specific race, The Silence are a religious order. Their agents on Earth have been there since before the dawn of mankind, directing human evolution. They use post-hypnotic suggestion to make people who see them instantly forget their existence. They believe that silence must fall when the oldest Question in the universe is asked. It will be asked at “the fall of the Eleventh” on the Fields of Trenzalore, and is hidden in plain sight. As a result, the Silence have tried to stop the Doctor reaching Trenzalore. They used their agent Madame Kovarian to kidnap Melody Pond, and raised her as the Doctor’s perfect assassin. Despite the failure of this plan, the Silence remain at large, determined to stop the Question ever being asked.
A hive-minded, peaceful race of alien telepaths, who due to their docile nature are often farmed and enslaved by humans. Natural, or “unprocessed” Ood hold their hindbrains in their hands, whereas those that have been processed have this replaced by a translator ball. The Doctor and Rose first encountered Ood serving on Krop Tor, where the Beast of the Pit attacked their telepathic field to turn the whole flock into killers. During the Doctor’s next meeting – at Ood Operations, a refinery on the Ood Sphere – he first heard the song of the Ood, and helped liberate the Ood’s collective consciousness. Their telepathic sensitivity enabled them to foretell the return of the Master, the creation of a Doctor-Donna and the regeneration of the Tenth Doctor. A lone Ood, called Nephew, was trapped in House’s pocket universe. He was atomised by Idris and the Doctor’s junk TARDIS materialising.
The Adipose reproduced on Nursery Worlds. When on Earth, the Adipose's development was started when a pill from Adipose Industries was ingested. The young Adipose would grow, collecting fat from around the body. Every night, the Adipose would then be born and leave the body. They could convert other material into fat; however, this practice was not good for their health. Alternative materials included the bones, organs, muscles and many other human tissues. In emergencies, this was used to dispose of people by turning them completely into Adipose.
The Catkind were a species of humanoid felines that originated on the planet New Savannah but soon spread across the New Earth Empire. The Sisters of Plenitude ran a hospital near New New York on New Earth. They had cures for nearly every known ailment and were able to heal their patients at a remarkable success rate. Unfortunately, these amazing skills were gained by using thousands and thousands of grown human clones known as "the Flesh". They were infected with every known disease and culled when any began to think. These disease carriers were released by Lady Cassandra and cured by the Tenth Doctor, producing the new humans. The Sisters were arrested by the NNYPD for their crimes.
When the Eleventh Doctor and Amy Pond came to Starship UK in the 33rd century, they investigated the ship. Along the way, Amy stumbled into a voting booth and learned the truth, only to vote to Forget. Eventually the Doctor discovered the heart of the ship, where Hawthorne and his workers were torturing the star whale with electric shocks to keep it moving, and faced the impossible situation. Seeing no reasonable options, the Doctor tried to render the space whale brain-dead so it would no longer feel pain from the torture, but would continue to support the ship. Amy, however, noticed the whale's neural tendrils affectionately playing with the children. She quickly put the pieces together and ran to the control system to press the "Abdicate" button with Liz Ten's hand, freeing the whale. The ship was not destroyed as was originally feared. Instead it started to move faster. As the star whale had come willingly and was still willing to help the people of the UK, it moved more swiftly without the torture dulling its senses.